The Lord said "Go forth & multiply." – He made no mention of making additions to the family.
University students; identical twins, Katrina & Elizabeth Kaufmann, were as close as siblings could be until Elizabeth broke their bond by sleeping with the Katrina's partner, George.
Before amends can be made Elizabeth dies tragically in the World Trade Centre disaster.
Book One: "The Twins have Fallen" follows a student's transition into adulthood, the high of meeting 'Mr Right' followed by the low of feeling responsible for the events leading up to the tragic death of her twin sister.
Book Two: "Life after Death" deals with the surviving twin's loss, her entry into the field of genetics and her bizarre attempt to replace her sister.
Book Three: "The Next Generation" follows the life of the clone who has been taken into local authority care.
Book Four: "My Sisters' Keeper" reveals the clone is 'not quite right', on reaching maturity the clone is producing clones of her own, who will, in turn, produce more identical offspring.